Mold for concrete blocks.



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MOLD FOR GONCRETE BLOCKS.

APPLICATION FILED IBB. I2, 1912.

1,052,571. Patented Feb.11, 1913.

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W. COBB.

MOLD POR CONCRETE BLOCKS.

APPLIUATION FILED 121113.12, 1912.

Patented Feb. 11, 1913.

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T33 www WILLIAM COBB, OF JACKSON, MICHIGAN.

MOLD FOR CONCRETE BLOCKS.

Specication of Letters Patent.

Patented Feb. 11, 1913.

Application filed February 12, 1912. Serial No. 677,216.

To all whom t may concern.'

Be it known that I, WILLIAM COBB, a citizen of the United States of America, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in Molds for Concrete Blocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in molds for making concrete blocks and its object is to provide a device readily adjustable for different sizes of blocks and to provide the same with various new and useful features hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings, in which Figure 1 is a perspective of a device embodying my invention in closed position ready to receive the concrete; Fig. 2 a perspective of a concrete block made in the device; Fig. 3 an end elevation of the device; Fig. 4 the same with one end frame removed to show the construction; Fig. 5 the same with the adjacent 'support 4 also removed; Fig. 6 a detail in central vertical section; Fig. 7 shows the device opened out for removing the block, with one end frame removed; Fig. 8 a detail in front elevation of one end of the device; Fig. 9 a plan view with portions broken away and in open position; Fig. 10 an enlarged detail of one of the adjustable stops for holding the swinging ends in place when filling the mold and Fig. 11 a detail of the adjusting means for the main back plate of the frame.

Like numbers refer to like parts in all of the figures.

The fixed portions or frame-work of the device consists of end frames 1 of suitable shape connected near the front by a tie rod 2 and at the rear by a plate 3. rlhis plate is preferably adj ustably attached to the frames whereby it can be properly vmade to engage the rear edges of the ends of the mold. Cap screws 3a extend through this plate near the top and bottom thereof and into suitable screw threaded lugs on the frame and midway between these are located screws 3b in the plate which at the end pivotally engage the frames whereby the plate may be rocked on said screws and brought to proper adjustment by means of the cap screws 3a.

ywith a series of openings to detachably and adjustably engage and pivotally support this casting upon the rod 2. From the to of this notched member extends opposite y projecting arms 5 and 5a. Ony the arm 5 is hinged the ends 7 of the mold proper and on the arm 5a is adjustably mounted a bracket 8 provided with a cam 9. Between this bracket and the ends 7 of the mold is inserted a follower board 10 which forms one side of the mold and also serves to support and carry away the block after the same has been molded. To the under side of each arm 5 is bolted the respective ends of a plate 16 whereby these arms are coupled to each other and held parallel. Resting upon the upper sides of these arms is a plate 19 having any preferred design for the outer surface of the block and this plate is detachably secured by a hook bolt 20 engaging an eye on the said plate and extending through the plate 16.

On the outwardly projecting arm 5a is a lug which when the device is opened to remove the block engages the bar 4 and supports the device in open position. To hold the end plates of the molds from spreading apart at the side opposite the hinges adjustable stops 11 are provided on the back plate of the frame which are preferably adjustable step by step at regular intervals by means of holes in the stop spaced apart and a pin 23 in the plate 3 as shown in Fig. 10. These stops can thus be adjusted apart for certain different lengths of blocks and are held in place when so adjusted by cap screws 12 inserted through slots in the stops extending parallel with the rows of holes.

To properly guide the mold to plate between these stops a grooved segment 17 extends from the rear edge of the plate 1G and engages the pin 1S in the back plate 3 of the frame. This also serves to properly adjust the plates, the notched member 6, and the bar 4, when assembling the device for any specified length of block.

14 are projections which serve as handles to swing the mold from closed to open position and back again and also to swing the end plates about the hinges. To form concave recesses 25 in the ends of the blocks convex plates are attached to the inner sides of the ends 7 and to form hand holes 26 in t-hese recesses these convex plates are provided with lune shaped projections 22. These plates can be'detachable and changed as occasion may require by removing the bolts by which they are secured.

In operation the device is assembled for the preferred size of block by changing the various detachable parts comprising the plates 16, and 19 for length and changing the end plates 7 for width and the depth of the mold adjusted accordingly by engaging the proper recess 6 with the rod 2, and adjusting the parts properly on the connecting rod 2 and plate 3. lVhen closed the plate 19 forms the botto-m of the mold, the plate 7 the ends of the mold, the plate 3 the rear of the same, the follower board 10 the front of the same, and the top is open to receive the material. If hollow blocks are to be made any of the ordinary forms of cores can be used for the purpose and laid in the mold when the same is partially filled, being withdrawn when the same is opened for removal of the block. When the mold has been filled it is turned about the axis of the rod 2 to the position shown in Figs. 7 and 9, the end plate swung open and the platen removed with the block thereon.

What I claim is 1. A mold for concrete blocks comprising, end frames, a plate and a rod connecting the end frames, supports pivotally mounted on the rod and adjustable vertically and longitudinally on the rod, a bottom plate, end plates and brackets carried by the supports, and means for relatively adjusting the supports about the axis of the ro 2. A mold for concrete blocks comprising,

i end frames, a plate and a tie rod forming a part of the connecting means for the frames and in fixed relation thereto, supports pivoted on the rod and adjustable longitudinally thereon, end plates, a detachable bottom plate and brackets carried o-n the supports, and means for adjusting the supports about the axis of the rod.

3. A mold for concrete blocks comprising, end frames, a back plate and a front rod in fixed relation, supports pivoted on the rod and adjustable longitudinally thereof, bars on the rod, and longitudinally adjustable thereon, lugs on the supports to engage the bars, a bottom plate detachably secured to the supports, end plates pivoted on the supports and brackets adjustably mounted on thesupports.

4. A vmold for concrete blocks, comprising a frame having a vertically disposed plate forming the rear connecting member of the frame and one side of a mold, a tie rod near the front of the frame; supporting members having arms pivoted on the rod and provided with lateral recesses at intervals to adjustably engage the rod, and a bottom plate end plates and a follower board carried solely by said supporting members. A

5. A mold for co-ncrete blocks, comprising a frame having a back plate forming the rear connecting member of the frame and one side of a mold, and a tie rod near the front, T-shaped supporting members having vertical arms laterally recessed at intervals to adjustably and pivotally engage the rod, a bottom plate, end plates and brackets carried solely by said members and means for supporting said membersy with the mold in open position.

6. A mold for concrete blocks, comprising a frame having a back plate forming the rear connecting member of the frame and one side of the mold, and a tie rod near the front, T-shaped supporting members having lateral recesses at intervals to pivotally and adjustably engage the rod, a bottom plate end plates and brackets carried solely by said members, cams in the brackets to hold a follower against the end plates, stops on the back plate to hold the end plates and means for supporting the mold in open position. j

7. A mold for concrete blocks, comprising a frame having a back-plate forming the rear connecting member of the frame and one side of a mold, and a tie rod near the front thereof, T-shaped supports having lateral recesses at intervals in their vertical members to adjustably and pivotally engage the tie rod, a bottom plate carried solely by said supports, end plates hinged to said supports, brackets mounted on said supports, cams in the brackets to engage a platen or follower board and means for shifting the supports about the axis of the rod to open and close the mold.

8. A mold for co-ncrete blocks, comprising a frame having a back plate forming the rear connecting member of the frame and one side of a mold, a tie rod near the front of the frame, support-s pivoted on the t-ie rod, a bottom plate end plates and brackets carried solely by said supports, bars mounted in the frame and lugs on the supports adapted to engage the bars when the mold therefrom and adjustable longitudinally thereof, supports pivoted on said tie rod and also adjustable longitudinally thereof, a plate detachably connecting said supports, a. bottom mold plate carried solely by said supports, end plates hinged to the supports, brackets mounted on the supports, and lugs on the supports t-o engage the bars.

10. A mold for concrete blocks, compris ing end frames, a back plate and a tie rod connecting the end frames, T-shaped supports pivoted on the tie rod and adjustable both vertically and longitudinally thereof, bars also adjustable longitudinally of the tie rod, a tie plate detachably attached to the rear arms of the supports, a bottom mold plate carried by said arms and detachably secured to the tie plate, end plates hinged to said rear arms, brackets mounted on the front arms of the supports and 'lugs on said arms adapted to engage the bars.

ll. A mold for concrete blocks, comprising end frames, a back plate adjustably attached to said frames and forming one side of a mold, a tie rod connecting said frames, supports pivoted on said rod and adjustable thereon toward and from each other, a tie plate connecting the supports, a grooved segment on the tie plate, a pin in the back plate to engage the segment, end plates hinged to the supports, stops adjustable on the back plate, brackets on the supports to hold a platen or follower against the end plates and means for supporting the mold in open position.

12. A mold for concrete blocks, comprising end plates, a back plate secured to the end frames and forming a side to a mold, a tie rod connecting said frames, T-shaped supports pivotally and adjustably supported on the rod, supporting bars mounted on the rod, a tie plate connecting said supports, a bottom plate carried by said1 supports and detachably secured to the tie plate, end plates hinged to the supports, stops on the back plate to engage the end plates, brackets on the supports to hold a platen against the end plates, cams in the brackets to engage said platen, and lugs on the supports engaging the supporting bars when the mold is open.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM COBB.

Witnesses:

JNO. H. CASEY, DAVID D. TRACY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, ID. C. 

